CN214451411U

CN214451411U - Track structure and excavator with same

Info

Publication number: CN214451411U
Application number: CN202120527318.0U
Authority: CN
Inventors: 崔锦华; 封小鹏; 陈琬
Original assignee: Suote Transmission Equipment Co Ltd
Current assignee: Suote Transmission Equipment Co Ltd
Priority date: 2021-03-11
Filing date: 2021-03-11
Publication date: 2021-10-22
Anticipated expiration: 2031-03-11

Abstract

The utility model provides a track structure and an excavator with the same, wherein the track structure comprises a caterpillar track section, a threaded hole is arranged on the bottom surface of the caterpillar track section, and the threaded hole is a blind hole; the crawler board is connected to the bottom of the caterpillar track section, a connecting hole is formed in the crawler board, and the connecting hole corresponds to the threaded hole; and the connecting bolt is arranged in the connecting hole and the threaded hole in a penetrating manner. The technical scheme of the utility model the track mounting process of excavator among the prior art is complicated, the poor defect of maintainability has been solved.

Description

Track structure and excavator with same

Technical Field

The utility model relates to an engineering machine tool technical field, concretely relates to track structure and have its excavator.

Background

Excavators are common work machines. Among them, a crawler belt having a pitch of 101mm or less is generally used for a mini excavator of 3.5 tons or less. For the caterpillar of the kind, because the caterpillar track link space is small, in the prior art, the caterpillar track link and the caterpillar track plate at the bottom of the caterpillar track link are connected in a welding mode. However, the above welding connection method has the following disadvantages:

1. the technical equipment and personnel investment is large: the welding connection needs to be invested in special welding equipment, special positioning tools, special welding personnel, tempering heat treatment equipment and the like, and the manufacturing cost is high;

2. the process route is long and the process is complex: before welding, the creeper tread needs positioning and spot welding fixing; in the welding process, the space of the inner gear of the left caterpillar track is small, the number of spaced welding seams is large, and the welding difficulty and strength are high; after welding, straightening treatment and tempering heat treatment are carried out on the creeper tread to eliminate welding internal stress;

3. poor maintainability: in the subsequent use process of the excavator, once the parts of the crawler belt are broken and have faults, the crawler belt needs to be integrally replaced.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the track mounting process of excavator among the prior art defect complicated, maintainability is poor to provide a track structure and have its excavator.

In order to solve the above problem, the utility model provides a track structure, include: the bottom surface of the caterpillar track section is provided with a threaded hole which is a blind hole; the crawler board is connected to the bottom of the caterpillar track section, a connecting hole is formed in the crawler board, and the connecting hole corresponds to the threaded hole; and the connecting bolt is arranged in the connecting hole and the threaded hole in a penetrating manner.

Optionally, the number of the threaded holes is multiple, the number of the connecting holes is multiple, and the positions of the threaded holes and the positions of the connecting holes correspond to each other one to one.

Optionally, the nominal diameter of the threaded hole is less than or equal to 12 millimeters.

Optionally, the pitch of the threaded hole is less than or equal to 1 millimeter.

Optionally, the connecting bolt comprises a threaded stud, a bolt head flange and a hexagonal head, wherein the dimensions of the threaded stud and the bolt head flange satisfy the following relationship: a is more than or equal to 1.5 a; wherein A is the diameter of the bolt head flange, and a is the nominal diameter of the threaded column.

Optionally, the dimensions of the hex head and bolt head flanges satisfy the following relationship: a is more than or equal to B; wherein A is the diameter of the bolt head flange, and B is the distance between two opposite vertexes of the hexagonal head.

Optionally, the tie bolt has a strength rating of 12.9.

Optionally, the pitch of the track structure is less than or equal to 101 mm.

Optionally, the caterpillar track sections are multiple, the caterpillar track sections are sequentially connected end to end through pin shafts, and a track shoe is connected to the lower portion of each caterpillar track section.

The utility model also provides an excavator, including the track structure, the track structure is foretell track structure.

The utility model has the advantages of it is following:

utilize the technical scheme of the utility model, be in the same place through connecting bolt fastening connection between caterpillar link and the grip-pad. On the one hand, the mounting mode of the fastener is simple, the operation is convenient, professional production equipment and professionals are not required to be invested, and the mounting process difficulty and the cost are reduced. On the other hand, when a certain creeper tread of the crawler structure is damaged, the connecting bolt is detached and a new creeper tread is replaced, so that single part replacement is realized, and the maintainability is improved. Consequently the technical scheme of the utility model the track mounting process of excavator among the prior art is complicated, the poor defect of maintainability has been solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows a schematic structural view of the track structure of the present invention;

FIG. 2 shows a side view schematic of the track structure of FIG. 1;

FIG. 3 shows a schematic structural view of a track link of the track structure of FIG. 1;

FIG. 4 shows a schematic view of the attachment bolts of the track structure of FIG. 1; and

fig. 5 shows a schematic top view of the connecting bolt of fig. 4.

Description of reference numerals:

10. a caterpillar link; 11. a threaded hole; 20. a track shoe; 21. connecting holes; 30. a connecting bolt; 31. a threaded post; 32. a bolt head flange; 33. a hexagonal head; 40. and (7) a pin shaft.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 and 3, the track structure of the present embodiment includes a track link 10, a track shoe 20, and a connecting bolt 30. Wherein, be provided with screw hole 11 on the bottom surface of caterpillar link 10, screw hole 11 is the blind hole. The track shoe 20 is connected to the bottom of the track link 10, and the track shoe 20 is provided with a connecting hole 21, and the connecting hole 21 corresponds to the threaded hole 11. The connecting bolt 30 is inserted into the connecting hole 21 and the threaded hole 11.

By means of the technical scheme of the embodiment, the caterpillar link 10 and the track plate 20 are fixedly connected together through the connecting bolt 30. On the one hand, the mounting mode of the fastener is simple, the operation is convenient, professional production equipment and professionals are not required to be invested, and the mounting process difficulty and the cost are reduced. On the other hand, when a certain track shoe 20 of the track structure is damaged, the connecting bolt 30 is detached and a new track shoe 20 is replaced, so that single-part replacement is realized, and the maintainability is improved. Therefore, the technical scheme of the embodiment overcomes the defects of complex installation process and poor maintainability of the crawler of the excavator in the prior art.

The above-mentioned "the connecting bolt 30 is inserted into the connecting hole 21 and the threaded hole 11" means that, when the track link 10 and the track shoe 20 are attached, the connecting bolt 30 is inserted into the connecting hole 21 and then screwed into the threaded hole 11, and the internal thread of the threaded hole 11 and the external thread of the connecting bolt 30 are screwed together. I.e. the track link 10 and the track plate 20 are connected together by a threaded fastener. Further, the connection hole 21 is a smooth hole without a threaded section.

The threaded hole 11 is a blind hole. The blind hole prevents cement on the upper side of the track link 10 from entering the thread pair when the excavator works, thereby preventing the thread structure between the threaded hole 11 and the connecting bolt 30 from being worn by foreign matters. Meanwhile, the structure does not need to be provided with a nut, so that the assembly step is simplified.

As shown in fig. 1 and 2, in the solution of the present embodiment, there are a plurality of threaded holes 11, a plurality of connection holes 21, and a plurality of threaded holes 11 and a plurality of connection holes 21 are in one-to-one correspondence. Specifically, the number of the screw holes 11 is four. It will be appreciated by those skilled in the art that for the track link 10, it comprises two oppositely disposed side plates, the track plate 20 being attached at the ends of the side plates. All be provided with two screw holes 11 on the bottom terminal surface of every curb plate, consequently set up four screw holes 11 altogether. Correspondingly, the track shoe 20 is also provided with four connecting holes 21. The arrangement positions of the four threaded holes 11 and the four connecting holes 21 are the same, so that when the track shoe 20 is placed at the bottom of the caterpillar link 10, the four threaded holes 11 and the four connecting holes 21 can be in one-to-one correspondence, and then the four connecting bolts 30 can be screwed into the four threaded holes 11 respectively.

Of course, the number and arrangement of the threaded holes 11 and the connecting holes 21 can be adaptively adjusted by those skilled in the art according to the actual structural size.

As shown in fig. 3, in the solution of the present embodiment, the nominal diameter of the threaded hole 11 is less than or equal to 12 mm. The pitch of the threaded hole 11 is less than or equal to 1 mm. Of course, the specific size of the threaded hole 11 can be adaptively adjusted by those skilled in the art according to the actual structural size.

As shown in fig. 4, in the solution of the present embodiment, the connecting bolt 30 includes a threaded column 31, a bolt head flange 32, and a hexagonal head 33. Wherein the dimensions of the threaded stud 31 and the bolt head flange 32 satisfy the following relationship:

A≥1.5a；

in the above relation, a is the diameter of the bolt head flange 32, and a is the nominal diameter of the threaded stud 31.

Specifically, the connecting bolt 30 in the present embodiment is a flange bolt, that is, a disk-shaped flange structure is provided at the bottom of the hexagonal head 33. The flange bolts are used to connect two hole structures together, i.e., the threaded holes 11 and the connection holes 21 in this embodiment. The hex head 33 is adapted to engage a wrench to facilitate tightening of the connecting bolt 30 by an operator. The nominal diameter a of the threaded post 31 is also the nominal diameter of the threaded hole 11.

As shown in fig. 5, in the solution of the present embodiment, the dimensions of the hexagonal head 33 and the bolt head flange 32 satisfy the following relationship:

A≥B；

in the above relation, a is the diameter of the bolt head flange 32, and B is the distance between the two opposite vertices of the hexagonal head 33.

Preferably, the strength rating of the connecting bolt in this embodiment is 12.9.

As shown in fig. 1 and 2, in the technical solution of the present embodiment, there are a plurality of track links 10, the track links 10 are sequentially connected end to end by a pin 40, and a track shoe 20 is connected below each track link 10. Specifically, the both ends of two curb plates of caterpillar link 10 all are provided with the mounting hole, and simultaneously, two curb plates are at same end internal contraction, and then make and can first be connected between a plurality of caterpillar links 10. When the plurality of caterpillar links 10 are connected together at the head, the mounting holes are aligned, and the pin shaft 40 can be inserted into the mounting holes. Further, a pin bushing is provided between the two side plates of the inner track link 10 at the connection.

Thus, according to the above structure, the installation process of the crawler structure in the present embodiment is as follows:

assembling a plurality of caterpillar links 10, the pin shafts 40 and the pin sleeves into a caterpillar assembly with a certain number of links by using a press machine, then placing a corresponding number of track shoes 20 at the bottom of the caterpillar links 10 to align the threaded holes 11 and the connecting holes 21, and then screwing the connecting bolts 30.

Preferably, the pitch of the track structure in this embodiment is less than or equal to 101 mm. The above structure is particularly suitable for small pitch tracks with a pitch less than or equal to 101 mm.

The embodiment also provides the excavator, and the excavator further comprises a crawler belt structure, wherein the crawler belt structure is not provided with the crawler belt structure. Of course, those skilled in the art will appreciate that other work machines having track structures, or machines in other fields, may employ the above-described structure.

According to the above description, the track structure of the present embodiment has the following advantages:

1. the caterpillar track sections are connected with the caterpillar track plates through bolts instead of welding, and the bolts are screwed down according to the regulations, so that the investment of equipment, tools and professionals is reduced, the production cost and the process risk are reduced, and the production efficiency is improved;

2. if the track parts are damaged in the after-sale market, the replacement of single parts can be realized, the integral replacement is not needed, and the maintainability is improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A track structure, comprising:

the caterpillar track section (10), wherein a threaded hole (11) is formed in the bottom surface of the caterpillar track section (10), and the threaded hole (11) is a blind hole;

the track shoe (20) is connected to the bottom of the caterpillar link (10), a connecting hole (21) is formed in the track shoe (20), and the connecting hole (21) corresponds to the threaded hole (11);

and the connecting bolt (30) is arranged in the connecting hole (21) and the threaded hole (11) in a penetrating manner.

2. The track structure according to claim 1, wherein the threaded holes (11) are plural, the connecting holes (21) are plural, and the positions of the threaded holes (11) and the connecting holes (21) are in one-to-one correspondence.

3. Track structure according to claim 1 or 2, characterized in that the nominal diameter of the threaded holes (11) is less than or equal to 12 mm.

4. Crawler structure according to claim 1 or 2, wherein the pitch of the threaded holes (11) is less than or equal to 1 mm.

5. Crawler structure according to claim 1 or 2, wherein the connection bolt (30) comprises a threaded stud (31), a bolt head flange (32) and a hexagonal head (33), wherein the dimensions of the threaded stud (31) and the bolt head flange (32) satisfy the following relation:

A≥1.5a；

wherein A is the diameter of the bolt head flange (32), and a is the nominal diameter of the threaded column (31).

6. Crawler structure according to claim 5, wherein the dimensions of the hexagonal head (33) and the bolt head flange (32) satisfy the following relation:

A≥B；

wherein A is the diameter of the bolt head flange (32) and B is the distance between two opposite vertexes of the hexagonal head (33).

7. Track structure according to claim 1 or 2, characterized in that the strength grade of the connecting bolt is 12.9.

8. A track structure according to claim 1 or 2, characterized in that the pitch of the track structure is less than or equal to 101 mm.

9. The track structure according to claim 1 or 2, wherein the track links (10) are provided in plurality, the track links (10) are connected end to end in sequence by a pin (40), and the track shoe (20) is connected below each track link (10).

10. An excavator comprising a track structure, wherein the track structure is as claimed in any one of claims 1 to 9.